/Engine/Source/Editor/AnimGraph/Public/IAnimBlueprintCompilationBracketContext.h
Indexof the nodes (must match up with the runtime discovery process of nodes, which runs thru the property chain)
const [TMap](API\Runtime\Core\Containers\TMap)< [UAnimGraphNode_Base](API\Editor\AnimGraph\UAnimGraphNode_Base) *, int32 > & GetAllocatedAnimNodeIndices() const